the application shows that it was not possible to connect to the server
You need to provide some details in order for anyone to try to help you:
-
phone manufacturer
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android version
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K-9 version
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incoming mail server name
- imap/pop
- security/port
- authentication [type]
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outgoing mail server name
- security/port
- require sign-in ?
– if yes:- authentication [type]
I already managed to solve it, I had to allow it in the Google account